retired fbi special agent bobby is with me. bobby, it sounds like they have a very good idea of what happened and they were able to figure it out relatively quickly. >> yeah, and i think they probably have a very good idea why it happened, as well. these incidents like this, a single individual acting alone, whether he targeted those people or not, we would know fairly quickly. high schools are an incubator for information. they probably talked to his fellow students, his teachers, his parents. they probably know what was happening in his life at this time. i'd be very surprised if the fact that today's his birthday is not a significant factor in what he did. so i think that they probably have a good idea. now, it's a matter of taking this information and how do we put it to use into our paradigm and procedures and how do we stop the next one? were there pre-incident indicators as we call them? did he tip off what he was going to do? so you get into the conversation of how do we build into our